TYNDALL AIR FORCE BASE, Fla. - After his arrival at Tyndall Air Force Base, Fla., for a mission-familiarization visit, Adm. Bill Gortney, (left) Commander, North American Aerospace Defense Command-U.S. Northern Command, joins Lt. Gen. William Etter, Commander, Continental U.S. North American Aerospace Defense Command Region - 1st Air Force (Air Forces Northern), Tyndall Air Force Base, Florida. During his visit, Gortney received a mission briefing and toured the 601st Air Operations Center. (U.S. Air Force Photo by Senior Airman Alex Echols III/Released)